Air Quality 10-day Charts

Weather 10-day Charts

Great Smoky Mountains National Park Data: Air Quality 10-day Charts

Ozone Data Collected at the Purchase Knob Monitoring Site

Ozone: 1-hour and 8-hour average concentrations

The chart below plots both the 1-hour and running 8-hour average ozone concentration, but only the 8-hour average should be used to compare with the standard. The standard is exceeded when the 8-hour ozone concentration reaches, or goes above, 70 parts per billion, as
denoted by the line with the label NAT'L AMBIENT AIR QUALITY STANDARD. The background of the chart is color coded
and relates to the EPA National Ambient Air Quality Standard for ozone, which is designed to protect human health.